Hello All, I am going to buy my first Mac...the MacPro. I am considering downgrading the standard configuration to only one 2.8GHZ Quad-Core Intel Xeon processor. I really have no use for 8-cores right now. My questions is: Do they put a differently configured motherboard in when you order it with only one processor, or is it the same board? Is there still room for two processors, or does the board only support one? Will I still have the option to go somewhere else and buy a second processor when they are cheaper than the $500 that Apple wants? I have been building and upgrading my own PCs for the better part of 15 years. So I am familiar with all of that and I know it will void the warranty, or be difficult, etc. I just need to know if it is the same board and if I will be able to put in my own 2nd CPU one day if I so choose. I apologize if this has been covered somewhere before in another posts, but my searches did not return anything that answered this. Best Regards!